VM just changed: access to a static from a super class must be qualified.

lib/compiler/implementation/ssa/nodes.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 interface HVisitor<R> {
   R visitAdd(HAdd node);
   R visitBitAnd(HBitAnd node);
   R visitBitNot(HBitNot node);
   R visitBitOr(HBitOr node);
   R visitBitXor(HBitXor node);
@@ skipping 733 matching lines @@
 
   // TODO(ngeoffray): Add a HPrimitiveType to get rid of the flag.
   const HNonPrimitiveType(Type this.type) : super(HType.FLAG_NON_PRIMITIVE);
 
   HType combine(HType other) {
     if (other.isNonPrimitive()) {
       HNonPrimitiveType temp = other;
       if (this.type === temp.type) return this;
     }
     if (other.isUnknown()) return this;
-    return CONFLICTING;
+    return HType.CONFLICTING;
   }
 
   String toString() => type.toString();
   Element lookupMember(SourceString name) => type.element.lookupMember(name);
 }
 
 class HInstruction implements Hashable {
   Element sourceElement;
 
   final int id;
@@ skipping 1532 matching lines @@
   final bool isAnd;
   final SubExpression left;
   final SubExpression right;
   final HBasicBlock joinBlock;
   HAndOrBlockInformation(this.isAnd,
                          this.left,
                          this.right,
                          this.joinBlock);
   bool accept(HBlockInformationVisitor visitor) => visitor.visitAndOrInfo(this);
 }